$\left(2x+3y\right)y'=2\left(x-y\right)$

$\left(6n\:+\:3m\right)^2$

$\lim_{x\to0}\left(\frac{2+x}{x^2\left(1-x\right)}\right)$

$\left(3\tan^22x-10\right)\left(\tan2x+3\right)=0$

$\left(0.99\right)^2$

$\left(x+1\right)\left(x-1\right)\left(m^2+1\right)+1$

$\frac{2}{3}a^3b^2c\:-\:5a^2b^3c^2\:;\:a\:=\:-2;\:b\:=\:3\:;\:c\:=\:4$